Attitude from friends

What the hell is wrong with ppl these days? Friends I have known for so long, and I've seen their true colours. Isit because of meeting them too many times until you face these kind of problems? One was very sarcastic in the way he replied my sms. The other was too stingy, just want to save 5cents, and didnt reply back. WHAT THE HECK IS WRONG WITH THESE PPL? Sometimes I wish this ppl can do some self reflection. If they can't even think of it properly, they can just knock their heads on the wall and die for all I care.